Cake:
10.1 ounces all-purpose flour (about 2 1/4 cups)
2 1/2 teaspoons baking powder
2 teaspoons ground cinnamon
1/4 teaspoon salt
1 cup packed brown sugar
1/4 cup butter, softened
1 teaspoon vanilla extract
2 large eggs
1 (15-ounce) can pumpkin puree
Cooking spray

Frosting:
2 tablespoons butter, softened
1/2 teaspoon vanilla extract
1 (8-ounce) package 1/3-less-fat cream cheese
2 cups sifted powdered sugar